- #1
pellman
- 684
- 5
Suppose we are taking the variation of a multiple integral and the integrand contains some terms with [itex]\frac{\partial g}{\partial x}[/itex]. When is it ok to put
[itex]\delta\frac{\partial g}{\partial x}=\frac{\partial}{\partial x}(\delta g)[/itex]
?
[itex]\delta\frac{\partial g}{\partial x}=\frac{\partial}{\partial x}(\delta g)[/itex]
?
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